"The soul that is yielded to Christ becomes His own fortress, which He holds in a revolted world, and He intends that no authority shall be known in it but His own. A soul thus kept in possession by the heavenly agencies is impregnable to the assaults of Satan."
"I can do all things through Christ which strengtheneth me."
Both passages teach that the believer's strength and security come entirely from Christ's indwelling power. Ellen White's "fortress" metaphor amplifies Paul's declaration of Christ-sourced capability.
"From age to age the Lord has been seeking to awaken in the souls of men a sense of their divine brotherhood. Be co-workers with Him. While distrust and alienation are pervading the world, Christ's disciples are to reveal the spirit that reigns in heaven. MH 159.2"
"That they all may be one; as thou, Father, art in me, and I in thee, that they also may be one in us: that the world may believe that thou hast sent me."
Both passages emphasize unity and brotherhood among believers, reflecting the divine nature and purpose. John 17:21 directly speaks of being 'one' as Christ and the Father are one, and EGW speaks of 'divine brotherhood' and revealing the 'spirit that reigns in heaven.' The connection is strong and meaningful.
"For we are labourers together with God: ye are God’s husbandry, ye are God’s building."
The EGW quote encourages being 'co-workers with Him,' which directly echoes 1 Corinthians 3:9, 'For we are labourers together with God.' The principle of working alongside God in His purposes is central to both passages.